The shifting science of DNA in the courtroom

(CNN)This summer marks 30 years since one of the biggest advances in criminal investigations, DNA profiling, identified a killer.
Every cell within every living creature contains DNA material. That material carries instructions that dictate everything from how tall you’ll be to what diseases you may develop, and it’s unique to you. Forensic scientists can find it in biological material left on a crime scene or body, like hair, saliva or even skin tissue.

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